/Engine/Source/Developer/MeshMergeUtilities/Public/MeshMergeDataTracker.h
Returns whether or not the raw mesh entry for the given MeshLOD key requires unique UVs for baking out its material(s)
bool DoesMeshLODRequireUniqueUVs ( [FMeshLODKey](API\Developer\MeshMergeUtilities\FMeshLODKey) Key )